The invention discloses a double-backfill type concrete vibrating rod capable of draining and refining and belongs to the field of concrete vibrating rods. In the vibrating process, negative air pressure is formed, so that concrete and air in the concrete are sucked into a straight cylinder; after the air is exhausted, the concrete is extruded out of the straight cylinder; in this process, on onehand, air in concrete is effectively exhausted through a suction type method; on the other hand, the flowability of concrete is accelerated, so that air, which is not sucked into the straight cylinder, in the concrete also escapes in an accelerated manner due to the flowing of the concrete; therefore, the vibrating effect of the concrete is effectively improved; furthermore, after the vibration isfinished; since a free deformation sleeve is automatically shrunk and refined, the size of the space formed when the free deformation sleeve is drawn out is effectively reduced, the backfill space ofconcrete is effectively reduced, meanwhile, the adsorption force of negative air pressure is matched, the backfill speed of the concrete is increased, the space formed when the free deformation sleeve is drawn out is fully and rapidly filled with the concrete, and the compactness of the concrete is improved.